Post #4142 by Aussi on the Mechanical Investing board

Investment Strategies / Mechanical Investing

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I use IBPro. I set a limit order at the mid point between the quoted bid and ask and it's usually filled immediately. I also use Vanguard. Recently I noticed that Vanguard has a wider spread on the bid/ask than IB. However, Vanguard usually beats my limit orders which are usually placed towards the one third point.

In the study I think they were placing market orders. Were they getting better than midpoint?

Aussi

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